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Product Detailed Parameters
- Description：JFET N-CH 30V TO206AC
- Series：-
- Mfr：Vishay Siliconix
- Package：Tube
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：30 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：200 mA @ 10 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：1.5 V @ 3 nA
- Input Capacitance (Ciss) (Max) @ Vds：160pF @ 0V
- Resistance - RDS(On)：7 Ohms
- Power - Max：500 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-206AC, TO-52-3 Metal Can
- Supplier Device Package：TO-206AC (TO-52)
- Grade：-
- Qualification：-
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Overview
The Vishay Siliconix U291 is an N-channel Junction Field-Effect Transistor (JFET) designed as a high-performance analog switch. It features a TO-206AC (TO-52) hermetically sealed package suitable for military applications. Key electrical parameters include a maximum drain-source on-resistance of 7 ohms, a gate-source cutoff voltage range of -1.5 to -4.5 V, and a typical turn-on time of 14 ns. The device supports a gate-source breakdown voltage of -30 V and operates within a junction temperature range of -55°C to 150°C.
Feature Summary
- Low on-resistance for minimal signal loss
- Fast switching capability with 14 ns turn-on time
- High off-isolation and low capacitance
- Hermetically sealed TO-206AC case
Applications
- Analog switches
- Choppers
- Sample-and-hold circuits
- Normally 'on' switches
- Current limiters
Procurement Notes
Verify the specific ordering suffix, such as -E3, which indicates lead-free compliance. Confirm that the TO-206AC package matches the required footprint and mounting style. Ensure the gate-source cutoff voltage range aligns with the control circuit requirements. Check for any environmental or military qualification standards if applicable to the design.
Selection Notes
Select the U291 when low on-resistance and fast switching are critical for analog signal routing. Compare the -1.5 to -4.5 V cutoff voltage range against system control levels. Consider the TO-206AC package size and thermal dissipation capabilities relative to the application's power constraints and operating temperature environment.
Part Context
The U291 belongs to the U290/U291 series of N-channel JFETs from Vishay Siliconix. This series is characterized by industry-low on-resistance and high-speed performance. It serves as a discrete alternative to integrated analog switches, offering flexibility in high-frequency and precision analog circuit designs requiring robust isolation and low error voltage.
Replacement Considerations
Consult the Vishay datasheet for the J105/106/107 series if TO-226A (TO-92) packaging is required instead of TO-206AC. Verify pinout compatibility and electrical parameter overlaps before substituting with other N-channel JFETs.
FAQ
What is the maximum gate-source breakdown voltage?
The maximum gate-source breakdown voltage is -30 V.
Is the U291 suitable for military applications?
Yes, the hermetically sealed TO-206AC case makes it suitable for military applications.
What is the typical turn-on time?
The typical turn-on time is 14 ns.
